Won't be used for write : write are synced (meaning: write it to disk, now) On 14/02/2016 10:55, Vickey Singh wrote: > Hello Community > > Happy Valentines Day ;-) > > I need some advice on using EXATA RAM on my OSD servers to improve Ceph's > write performance. > > I have 20 OSD servers each with 256GB RAM and 6TB x 16 OSD's, so assuming > cluster is not recovering, most of the time system will have at least > ~150GB RAM free. And for 20 machines its a lot ~3.0 TB RAM > > Is there any way to use this free RAM to improve write performance of > cluster. Something like Linux page cache for OSD write operations. > > I assume that by default Linux page cache can use free memory to improve > OSD read performance ( please correct me if i am wrong). But how about OSD > write improvement , How to improve that with free RAM. > > PS : My Ceph cluster's workload is just OpenStack Cinder , Glance , Nova > for instance disk > > - Vickey - > > > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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